WASHINGTON (Reuters) -After the fatal shooting of right-wing influencer Charlie Kirk, U.S. Republicans have a warning for Americans: Mourn him respectfully or suffer the consequences. Over the past several days, Democratic and Republican leaders have widely condemned the murder of Kirk, a 31-year-old activist and Trump world celebrity known for his hard-right views and pugnacious debating style. A smattering of commentators – including ordinary people joking about and sometimes celebrating Kirk's death to lawmakers and pundits dwelling on his history of bigoted rhetoric – has also surfaced, only to be targeted in organized campaigns.